Download or read book Design of CMOS Integrated Q enhanced RF Filters for Multi Band Mode Wireless Applications written by Gao Zhiqiang and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of CMOS Integrated Q-enhanced RF Filters for Multi-Band/Mode Wireless Applications.

Download or read book Advanced Trends in Wireless Communications written by Mutamed Khatib and published by IntechOpen. This book was released on 2011-02-17 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical limitations on wireless communication channels impose huge challenges to reliable communication. Bandwidth limitations, propagation loss, noise and interference make the wireless channel a narrow pipe that does not readily accommodate rapid flow of data. Thus, researches aim to design systems that are suitable to operate in such channels, in order to have high performance quality of service. Also, the mobility of the communication systems requires further investigations to reduce the complexity and the power consumption of the receiver. This book aims to provide highlights of the current research in the field of wireless communications. The subjects discussed are very valuable to communication researchers rather than researchers in the wireless related areas. The book chapters cover a wide range of wireless communication topics.

Download or read book CMOS Integrated LC Q enhanced RF Filters for Wireless Receivers written by Wesley Albert Gee and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In wireless transceiver circuits some of the most prevalent required off-chip components are discrete filters. These components are generally implemented with surface acoustic wave (SAW) or ceramic components. These devices are used in the receiver section for discrimination of incoming radio frequency (RF) signals as well as downconverted intermediate frequency (IF) signals. Presently, with the growing demand for multi-functional wireless consumer devices, the need for full integration of RF and logic circuits in wireless communications systems is becoming increasingly evident. If integrated RF filters with acceptable electrical characteristics could be realized, this might reduce or eliminate the currently required off-chip filters, prospectively decreasing the complexity, size, and cost of future wireless transceiver circuits and systems. The objective of the present research effort is to implement an integrated Q-enhanced LC bandpass filter in a prospective receiver front-end RF amplifier using the passive and active components available in a standard digital complementary metal-oxide semiconductor (CMOS) process. CMOS is the standard design medium for digital circuitry, and with the increased unity gain or transit frequency (fT) values that accompany steadily shrinking CMOS device sizes, the implementation of gigahertz frequency communications circuits in this medium is increasingly feasible. The circuit design specifically investigated in this work introduces a loss-compensated second-order gigahertz range bandpass filter implemented in a 0.18 m︡ digital CMOS process provided by National Semiconductor. This filter incorporates a unique design technique that provides improvements in filter linearity through an independently variable bias level shifting method, while also facilitating prospective single-to-differential signal conversion. One distinctive characteristic of the investigated circuit, in comparison to other RF integrated filter work, is the implementation of a novel integrated transformer feedback method that facilitates magnetically coupled loss-restoration and subsequent filter Q-enhancement. Additionally, this loss restoration method is achieved using a single transistor, in contrast to the multi-transistor cross-coupled transconductor Q-enhancement technique commonly implemented in other previous and current integrated RF filter research.

Download or read book Multiband Dual Function CMOS RFIC Filter Switches written by Cam Nguyen and published by Springer Nature. This book was released on 2020-05-25 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the theory, analysis, and design of multiband dual-function microwave and millimeter-wave CMOS radio frequency integrated circuit (RFIC) filter-switches capable of simultaneous switching and filtering, which are relevant for advanced multiband RF systems. Typical microwave and millimeter-wave switches are designed only for switching purposes without considering frequency selectivity or filtering. A separate filter is normally needed to be used with a switch to provide a filtering function. This conventional design approach hence leads to higher insertion loss, larger size and higher cost for RF systems. RF systems operating over multiple bands provide numerous advantages and offer more capabilities for communications and sensing than their single-band counterparts. A concurrent multiband system enables one single system to be used over multiple bands simultaneously, leading to optimum size, cost, and power consumption, together with ease of system implementation. Truly concurrent multiband systems require many components to work on multiple bands simultaneously, including concurrent multiband switches. Microwave and millimeter-wave integrated circuits using silicon-based CMOS (or related BiCMOS) RFICs are less expensive and better suited to direct integration with digital ICs than those using III-V compound semiconductor devices. CMOS RFICs are also small and offer low power consumption, making them suitable for portable battery-operated systems. Accordingly, CMOS RFICs are very attractive for RF systems and are the principal choice for commercial wireless markets. The content is divided into six chapters, the first four of which describe and address band-pass, high-pass, and low-pass filters, as well as multiband band-pass filters, the fundamentals of switches, and various switch architectures including single-pole single-throw (SPST), single-pole double-throw (SPDT), transmit/receive (T/R), and ultra-high-isolation switches, the fundamentals and models of MOSFETs used in the design of switches, and the essentials of CMOS RFIC design needed for the filter-switches presented in this book. In turn, the fifth chapter presents the core of the book, namely the design, simulation, and measurement of various CMOS dual-band dual-function SPDT and T/R switches capable of concurrent switching and filtering, as examples to illustrate the design of multiband dual-function filter-switches. These components operate in two different frequency bands centered at approximately 40 and 60 GHz and 24 and 60 GHz. Lastly, a summary and conclusion are provided in Chapter 6.

Download or read book Advanced Trends in Wireless Communications written by Mutamed Khatib and published by BoD – Books on Demand. This book was released on 2011-02-17 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical limitations on wireless communication channels impose huge challenges to reliable communication. Bandwidth limitations, propagation loss, noise and interference make the wireless channel a narrow pipe that does not readily accommodate rapid flow of data. Thus, researches aim to design systems that are suitable to operate in such channels, in order to have high performance quality of service. Also, the mobility of the communication systems requires further investigations to reduce the complexity and the power consumption of the receiver. This book aims to provide highlights of the current research in the field of wireless communications. The subjects discussed are very valuable to communication researchers rather than researchers in the wireless related areas. The book chapters cover a wide range of wireless communication topics.

Download or read book Multi Mode Multi Band RF Transceivers for Wireless Communications written by Gernot Hueber and published by John Wiley & Sons. This book was released on 2011-04-04 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Includes original contributions from distinguished researchers and professionals. Covers cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Contributors are all leading researchers and professionals in this field.

Download or read book Linear CMOS RF Power Amplifiers for Wireless Applications written by Paulo Augusto Dal Fabbro and published by Springer Science & Business Media. This book was released on 2010-06-22 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in electronics have pushed mankind to create devices, ranging from - credible gadgets to medical equipment to spacecraft instruments. More than that, modern society is getting used to—if not dependent on—the comfort, solutions, and astonishing amount of information brought by these devices. One ?eld that has continuously bene?tted from those advances is the radio frequency integrated c- cuit (RFIC) design, which in its turn has promoted countless bene?ts to the mankind as a payback. Wireless communications is one prominent example of what the - vances in electronics have enabled and their consequences to our daily life. How could anyone back in the eighties think of the possibilities opened by the wireless local area networks (WLANs) that can be found today in a host of places, such as public libraries, coffee shops, trains, to name just a few? How can a youngster, who lives this true WLAN experience nowadays, imagine a world without it? This book dealswith the design oflinearCMOS RF PowerAmpli?ers(PAs). The RF PA is a very important part of the RF transceiver, the device that enables wireless communications. Two important aspects that are key to keep the advances in RF PA design at an accelerate pace are treated: ef?ciency enhancement and frequen- tunable capability. For this purpose, the design of two different integrated circuits realizedina0. 11μmtechnologyispresented,eachoneaddressingadifferentaspect. With respect to ef?ciency enhancement, the design of a dynamic supply RF power ampli?er is treated, making up the material of Chaps. 2 to 4.

Download or read book Design of High Frequency Integrated Analogue Filters written by Yichuang Sun and published by IET. This book was released on 2002-04-15 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sun (communication electronics, U. of Hertfordshire, UK), this volume's editor, also contributed a chapter on the architectures and design of OTA/gm-C filters. The other papers describe on-chip automatic tuning of filters, analog adaptive filters, low voltage techniques for switched-current filters, log domain filters, the MOSFET-C technique and active filters using integrated inductors. The contributors teach electrical engineering in the US, the UK, Thailand, and Canada. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Design and Analysis of Multi Band Filtering Circuits written by Xiaojun Bi and published by Springer Nature. This book was released on 2021-12-13 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book systematically introduces the design theory and method of multi-band RF filtering circuits for the modern wireless communication systems or radar systems, which are required to operate at multi-bands. These multi-band filtering RF circuits have drawn more and more attention from the engineers and scientists in the field of RF circuits design. The book proposes the detailed theoretical analysis and abundant experimental data of multi-mode resonators, multi-band bandpass filter with high selectivity, reflectionless multi-band bandpass filter, balanced filter with high suppression, slotline based multi-band balun filter, switchable filtering diplexer based on reused L-shape resonator and miniaturized 55-/95-GHz on-chip dual-band bandpass Filter. The book is intended for undergraduate and graduate students who are interested in filtering circuits design, researchers who are investigating RF & microwave systems, as well as design engineers who are working in the RF & microwave circuits field. Readers can get an in-depth understanding about the multi-band RF filtering circuits design theory and method.

Download or read book Filter Design Solutions for RF systems written by Leonardo Pantoli and published by MDPI. This book was released on 2020-11-19 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue focuses on the state-of-the-art results from the definition and design of filters for low- and high-frequency applications and systems. Different technologies and solutions are commonly adopted for filter definition, from electrical to electromechanical and mechanical solutions, from passive to active devices, and from hybrid to integrated designs. Aspects related to both theoretical and experimental research in filter design, CAD modeling and novel technologies and applications, as well as filter fabrication, characterization and testing, are covered. The proposed research articles deal with different topics as follows: Modeling, design and simulation of filters; Processes and fabrication technologies for filters; Automated characterization and test of filters; Voltage and current mode filters; Integrated and discrete filters; Passive and active filters; Variable filters, characterization and tunability.

Download or read book Blocker tolerant Integrated Tunable Filters in CMOS for Next Generation Wireless Communication written by Md Naimul Hasan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern wireless communication standards support numerous frequency bands. A dedicated surface acoustic wave (SAW) filter is assigned to each single band to isolate the desired frequency bands. As a result, multiple SAW filters are necessary to cover different frequency bands which clearly increases cost and form factor. There is a strong demand towards complete integrated solutions to reduce the cost and form-factor of wireless devices. However, it is quite challenging to build integrated high-performance bandpass filters. The inherent losses associated with on-chip inductors lead to filters having relatively high insertion losses, limited dynamic range and low out-of-band rejection. For this reason, nowadays, most wireless systems utilize individual off-chip filters rather than fully integrated bandpass filters. A cellular radio receiver is required to recover a weak desired signal in presence of other in-band and out-of-band interfering signals (blockers). These interfering signals near the desired signal need to be suppressed. To that end, a band selection filter is used to provide attenuation for out-of-band signals, and a subsequent baseband lowpass channel select filters provide channel selection. Existing filters providing channel selection directly at RF for cellular applications does not have adequate rejection in the stopband to full LTE requirements. In this thesis, several techniques based on N-path filters have been proposed to handle large out-of-band blockers. The ultimate rejection of classical N-path fillter is limited due to non-zero switch resistance. A cascaded configuration of bandpass (BP) and bandstop (BS) filter is utilized to create notches on both sides of the passband where the center frequency of bandstop filters are shifted by using feed-forward and feedback g[subscript m] cell. The filter is tunable from 0.2 GHz to 1.8 GHz. The proposed tunable filter has 48.3 dB rejection at 20 MHz offsetand has 58.8 dB rejection at 45 MHz offset from the center frequency. The simulated stop-band rejection of the filter is 71.2 dB. However, it is diffcult to create nearby notches without affecting the passband response of the later. To overcome the above diffculty, a new architecture is presented based on two-path signal cancellation technique to create notches close to the passband to handle large blockers. The filter consists of a tunable BPF in parallel with tunable BS filters. Due to the subtraction of BP and BS filters two notches can be created. This combination ensures the correct amplitude and phase relationships across a wide tuning range to create adjustable TZs without sacrificing the gain of the passband. This paper presents in detail the design considerations and guidelines, as well as analysis of the filter performance in the presence of non-idealities such as parasitics and imperfect clock signal shape. The proposed filter is implemented with high-Q N-path lter blocks in a 65-nm CMOS process. The passband of the filter is tunable from 0.1 GHz to 1.4 GHz with a 3-dB bandwidth of 9.8-10.2 MHz, a gain of 21.5-24 dB, a noise figure of 3-4.2 dB, and a total power consumption of 50-73 mW. TZs are created on both sides of the passband with a minimal offset of 25 MHz and are tunable across a 20 MHz range with up to 60 dB rejection. The measured blocker 1-dB compression point is 8 dBm and the out-of-band IIP3 is 23 dBm. The reported filter provides a promising on-chip filtering solution for multi-standard, multi-frequency software-dened radio applications with improved interference mitigation capabilities. Various on-chip techniques to handle out-of-band blockers have been proposed recently. Although these approaches are suitable for suppressing a single frequency blocker, the created single-frequency notch is not effective in presence of wideband blockers which is becoming more prevalent with the development in high-speed wireless communications. A tunable active bandpass filter with bandwidth-adjustable notches close to the passband for wideband blocker suppression with high attenuation is designed and fabricated. The proposed filter is composed of a 3-pole N-path bandstop filter in cascade with an Npath bandpass filter, where the center frequency of the bandpass filter is offset from the bandstop filters. With proper tuning of the coupling capacitors in the bandstop filter, three adjacent notches can be created which provides a larger suppression bandwidth. An implementation of the filter in 65-nm CMOS exhibits a passband tunable between 0.1-1.1 GHz, with a 3-dB bandwidth of 12.4-14.2 MHz, a gain of 9.5-10.3 dB, a noise figure of 4.3-5.8 dB, and a total power consumption of 40-64.3mW. The blocker 1-dB compression point is 6.5 dBm and the out-of-band IIP3 is 18.4 dBm.

Download or read book Microstrip Filters for RF Microwave Applications written by Jia-Sheng Hong and published by John Wiley & Sons. This book was released on 2011-01-06 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of “Microstrip Filters for RF/Microwave Applications” was published in 2001. Over the years the book has been well received and is used extensively in both academia and industry by microwave researchers and engineers. From its inception as a manuscript the book is almost 8 years old. While the fundamentals of filter circuits have not changed, further innovations in filter realizations and other applications have occurred with changes in the technology and use of new fabrication processes, such as the recent advances in RF MEMS and ferroelectric films for tunable filters; the use of liquid crystal polymer (LCP) substrates for multilayer circuits, as well as the new filters for dual-band, multi-band and ultra wideband (UWB) applications. Although the microstrip filter remains as the main transmission line medium for these new developments, there has been a new trend of using combined planar transmission line structures such as co-planar waveguide (CPW) and slotted ground structures for novel physical implementations beyond the single layer in order to achieve filter miniaturization and better performance. Also, over the years, practitioners have suggested topics that should be added for completeness, or deleted in some cases, as they were not very useful in practice. In view of the above, the authors are proposing a revised version of the “Microstrip Filters for RF/Microwave Applications” text and a slightly changed book title of “Planar Filters for RF/Microwave Applications” to reflect the aforementioned trends in the revised book.

Download or read book High Q Multi band Filters written by Li Zhu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent development of multifunctional communication systems capable of processing large amount of data has triggered the demand for novel payload configurations with advanced filtering functions. To increase the payload flexibility, a large number of multiplexer and filter networks with different frequency plans are usually employed for the transmitting downlink. Multi-band filters are the required function in many cases for minimizing integration complexity and reducing size and mass of space systems. The multi-band filters combine the frequency spectrums of non-contiguous channels before transmitting through antenna beams, and provide sufficient rejection to the frequency spectrums of the adjacent channels, thus maintaining a high signal-to-interference ratio especially in multi-beam frequency-reuse communication systems. Traditional approaches to realize multi-band filters do not offer advantages in terms of size and mass reduction. Multi-mode resonators have the advantage of size reduction; however they are not often used in multi-band applications due to the challenges of operating the multiple modes in prescribed passbands simultaneously. The main research objective of this thesis is to investigate the feasibility of designing multi-band filters based on high-Q multi-mode resonators. Various multi-mode waveguide and dielectric resonators are explored to realize multi-band filters. The proposed multi-band filters do not require junctions and can achieve an equivalent performance with fewer cavities, thus significantly reducing the footprint when compared to traditional approaches. Furthermore, tunable multi-band filters with a constant absolute bandwidth and minimum degradation during the tuning process is investigated and developed. A systematic design approach of designing multi-band filters based on multi-mode resonators is established in this work starting from the coupling-matrix synthesis of the multi-band network. Following that, dual-band filters based on elliptical and rectangular dual-mode resonators are proposed. The two passbands of the dual-band filter are carried by two independent cavity modes and realized by an inline direct-coupled configuration. The inline dual-band filter design can convert to a diplexer structure by modifying the output ports at the end-resonators. To improve near-band frequency selection of both channels, multiple configurations to realize quasi-elliptic dual-band filter functions are proposed. The first quasi-elliptic design is based on a combination of dual-mode and single-mode rectangular resonators resulting in multiple transmission zeros and improved spurious response. The second structure is a side-coupled design based on dual-quadruplet configuration featuring a pair of transmission zeros on each of the passband and a very compact layout. Limitations of the quasi-elliptic design are investigated and modified structures have been proposed with improved RF performances. Triple-band filters are realized by three types of high-Q cavity resonator structures. Each cavity resonator employs triple-modes with resonant frequencies associated with the three passbands. The first design was an elliptical waveguide triple-band filter with an in-line configuration. Each passband of the filter was controlled by a dedicated polarization and represented by an inline direct-coupled set of resonators. The second design was a rectangular-cavity triple-band filter with a folded configuration. The folded configuration overcomes a number of drawbacks from the elliptical in-line design including an improved tunability and ease of assembly. The last design was a triple-band filter design based on dielectric loaded cavity resonators. The unique dielectric resonator structure results in triple-band filters having a very compact size, high Q, and stable thermal response. Further adding tuning capability to the multi-band filter can provide an additional degree of flexibility for the communication payload. A tunable multi-band filter with a constant absolute bandwidth is developed based on combline resonator and requiring only a single tuning element. The performance is demonstrated with an in-house-developed tuning station. It achieves a constant selectivity over a tuning range of 170 MHz and an unloaded Q better than 3000. The novel filter configurations proposed in this thesis promise to be useful not only for satellite payload applications but also for a wide range of wireless base station applications.

Download or read book A Q enhanced 3 6 GHz Tunable CMOS Bandpass Filter for Wideband Wireless Applications written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Analog and RF IC Design for Wireless Communication Systems written by Gabriele Manganaro and published by Academic Press. This book was released on 2013-05-13 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Analog and RF IC Design for Wireless Communication Systems gives technical introductions to the latest and most significant topics in the area of circuit design of analog/RF ICs for wireless communication systems, emphasizing wireless infrastructure rather than handsets. The book ranges from very high performance circuits for complex wireless infrastructure systems to selected highly integrated systems for handsets and mobile devices. Coverage includes power amplifiers, low-noise amplifiers, modulators, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs), and even single-chip radios. This book offers a quick grasp of emerging research topics in RF integrated circuit design and their potential applications, with brief introductions to key topics followed by references to specialist papers for further reading. All of the chapters, compiled by editors well known in their field, have been authored by renowned experts in the subject. Each includes a complete introduction, followed by the relevant most significant and recent results on the topic at hand. This book gives researchers in industry and universities a quick grasp of the most important developments in analog and RF integrated circuit design. - Emerging research topics in RF IC design and its potential application - Case studies and practical implementation examples - Covers fundamental building blocks of a cellular base station system and satellite infrastructure - Insights from the experts on the design and the technology trade-offs, the challenges and open questions they often face - References to specialist papers for further reading

Download or read book A Q enhanced 3 6 GHz Tunable CMOS Bandpass Filter for Wideband Wireless Applications written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Data Acquisition Applications written by Zdravko Karakehayov and published by BoD – Books on Demand. This book was released on 2012-08-23 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data acquisition systems have numerous applications. This book has a total of 13 chapters and is divided into three sections: Industrial applications, Medical applications and Scientific experiments. The chapters are written by experts from around the world, while the targeted audience for this book includes professionals who are designers or researchers in the field of data acquisition systems. Faculty members and graduate students could also benefit from the book.